自动地平仪

O: are you ready for your first driving lesson? S: yes. Which one is the brake again? O: the pedal on your left is the brake and the one on your right is the gas. S: Im glad this car is an automatic. I don't like having to change gears. O: automatics

发表于:2018-11-30 / 阅读(270) / 评论(0) 分类 生活英语情景口语

Conditions on Mars were so harsh that it was hard to imagine any life surviving there. The idea of sophisticated aliens was wiped out. We know that conditions on Mars today are not very good for life.

发表于:2018-12-07 / 阅读(201) / 评论(0) 分类 火星生命

These discoveries raised the stakes. Here was a planet similar to our own. Mars might not have cities or civilizations. But it could be home to other smaller life forms like microbes. Chris McKay is N

发表于:2018-12-07 / 阅读(220) / 评论(0) 分类 火星生命

I think it is exciting. Because it would imply that if life arose independently on Mars. The implication is that life is pervasive throughout the universe. This is why Mars has so obsessed scientists.

发表于:2018-12-07 / 阅读(208) / 评论(0) 分类 火星生命

In 2001 a new NASA probe was launched. Called Odyssey, it was sent to Mars to carry out the most detailed analysis ever of the planet’s surface. What it has discovered may be about to answer one of

发表于:2018-12-07 / 阅读(186) / 评论(0) 分类 火星生命

But even if there had been water, life doesn't start overnight. Even a simple microbe is the product of complex chemical systems that take millions of years to evolve. Had the water lasted long enough

发表于:2018-12-07 / 阅读(185) / 评论(0) 分类 火星生命

Rice had seen the same thing in Iceland, one of the few places on Earth with similarities to Mars. It too is extremely cold, and most of the water is frozen into glaciers. And also like Mars, buried u

发表于:2018-12-07 / 阅读(235) / 评论(0) 分类 火星生命

For Mars to have rivers, it must once have had streams, rain, clouds and an atmosphere, a planet just like the Earth today-if these were rivers. They had to be sure. The answers would come in 1998 wit

发表于:2018-12-07 / 阅读(237) / 评论(0) 分类 火星生命

William Boynton is professor of planetary sciences at the University of Arizona. And he's dedicated his life to looking for water on Mars. The link between life and water is very strong. Even here in

发表于:2018-12-07 / 阅读(212) / 评论(0) 分类 火星生命

Quarter in a payphone Drying laundry on the line Watching sun tea in the window Pocket watch, tellin' time Seems like only yesterday, I'd get a blank cassette Record the country countdown, 'cause I couldn't buy it yet If we drove all the way to Dalla

发表于:2018-12-08 / 阅读(235) / 评论(0) 分类 格莱美获奖歌曲

'Deepwater Horizon' Honors The Sacrifice Without Sacrificing The Action play pause stop mute unmute max volume 00:0003:02repeat repeat off Update Required To play the media you will need to either update your browser to a recent version or update you

发表于:2018-12-18 / 阅读(177) / 评论(0) 分类 2016年NPR美国国家公共电台10月

Of course, any terraforming is still a long way off. The next few expeditions to Mars will definitely be made by machines. NASA, are sending 2 rovers, capable of travelling over 100 meters a day in se

发表于:2019-01-02 / 阅读(210) / 评论(0) 分类 火星生命

Well, hearing that Odyssey had found subsurface water on Mars was enormously exciting for somebody who is involved in planning to send humans to Mars. Water has a number of important uses for us. At t

发表于:2019-01-02 / 阅读(239) / 评论(0) 分类 火星生命

Life on Earth is basically proteins and DNA, so we can wonder if there is life on Mars will also be DNA and proteins, the same type of DNA, the same type of proteins. One might think that DNA is such

发表于:2019-01-02 / 阅读(203) / 评论(0) 分类 火星生命

But there was something even better. Odyssey may not just have found ice. There may also be liquid water, and that means, there could be living creatures there too. Right now, there might be liquid wa

发表于:2019-01-02 / 阅读(246) / 评论(0) 分类 火星生命

But they never got there. The first disappeared into deep space. Another missed its target when its coordinates were confused. One NASA control center was working in metric, the other in feet and inch

发表于:2019-01-02 / 阅读(265) / 评论(0) 分类 火星生命

The ground here is permafrost, a mixture of soil and ice frozen together. A group of Russian scientists have teamed up with NASA to drill down into it in search of microorganisms. It's work that's bee

发表于:2019-01-02 / 阅读(226) / 评论(0) 分类 火星生命

One of these wavelengths corresponds to hydrogen, another wavelength would be iron. Another wavelength would be oxygen. And so you go to the part of the spectrum you are interested in and you see you'

发表于:2019-01-02 / 阅读(224) / 评论(0) 分类 火星生命

Automatic US Spending Cuts Loom Under current U.S. law, automatic cuts to domestic programs and national defense will begin in 2013, because a congressional committee failed to agree on trimming Americas federal deficit. Already, many lawmakers say t

发表于:2019-01-10 / 阅读(250) / 评论(0) 分类 VOA标准英语2011年(十一月)

今天我们要学的词是 automatic。Automatic 自动的。semi-automatic rifle 半自动步枪。If the Congress doesn't take action soon, automatic spending cuts will take effect on March 1st. 如果国会不马上采取行动的话,政府削减

发表于:2019-01-11 / 阅读(221) / 评论(0) 分类 英语单词荟萃
学英语单词
adansonia gregoriis
An Truong
anakmesis
AQ (any quantity)
Barengapara
bearing brass
biharmonic friction
cacheings
Cenuriasis
charles vi
cherrywood
chiana
cimicifuga foelida l. var. simplex huth.
condensate film
consummated offender
continuous annuity
cored vesicle
cosmic ecology
cryomorphic soil
curveter
cynthia silk moth
data teletypewriter set
dead broke
dimethyl phenol
disposal of wood
Donets Basin
duplicate receipt
dysanalite
earmarked gold
EHCS (electro hydraulic control system)
employment stability
ere-done
erythropterin
exorrhizal
flannel-like fabric
fluviatle
geroderma
gib
girlie girl
gongylodont
gracioso
granther
guide someone's steps
Hamburger's shift
hand shake cycle
hard-wares
have an attack of
hexacoralla
high-resolution liquid chromatography
history of verse
hot house production
Huateng
hunky punks
hydroxy aldehyde
hydrozinkite
inedible
initiation temperature
inmake
interdisciplinary study
iodophenol
isogonic
ivel
kittays
lower hitch-point clearance
Madelung
maryknoll
maximum dumping height
mild fusing metal casting investment
mispronouncer
mitsukoshi
Mossotti
nerve rack
nitrogen-cooling circuit
nonclassical radix
nuclear-powered
omniformity
oxyglottis
posttheater
prelimed juice
pressure distillation
problem solving oriented
public work
purgative method
purple fringeless orchids
re-electability
rectifier type differential relay
rig fixer
senior registrar
seventies bush
skew rebate plane
solomos
source of ignition
spanning length
spongioblastomas
standard flat wagon
testimonial proof
the number of an airdrome mission
Thomas The Rhymer
Toho line
true-banked turn
Wijk
worthliness